Self-grinding gas pipeline seal seat valve for high temperature and dust environments

Abstract

The invention discloses a self-grinding gas pipeline seal seat valve for high temperature and dust environments. The self-grinding gas pipeline seal seat valve comprises a valve casing body, a lifting mechanism, a suspension mechanism, a rotation driving mechanism, a sweeping mechanism, a valve core and a seal ring; the lifting mechanism is connected with a valve rod; the valve rod is connected with the suspension mechanism; the lower part of the suspension mechanism is provided with the rotation driving mechanism; the lower part of the rotation driving mechanism penetrates through the valve casing body through a rotary valve rod and is connected with the valve core; the seal ring is arranged at an air inlet in the lower part of the valve casing body; the sweeping mechanism is arranged at the side wall of the valve casing body; a control mechanism is connected with the lifting mechanism, the rotation driving mechanism and the sweeping mechanism. The problem of the seal stop of a valve body under the high temperature and dust environments is solved, so that the seal valve is prolonged to 11 thousand times of opening and closing from several times after which the seal valve can lose efficacy after being opened and closed originally; moreover, the self-grinding gas pipeline seal seat valve disclosed by the invention has an excellent seal effect; after the self-grinding gas pipeline seal seat valve is closed, zero leakage is realized; the equipment replacing frequency is reduced; production can be smoothly performed; the self-grinding gas pipeline seal seat valve is worthy of being applied and popularized.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a gas pipeline sealing seat valve for self-grinding high-temperature dust environments. Background technique [0002] In the gas pipeline valves for dust in high-temperature environments, due to the inclusion of a large amount of dust, the sealing of the on-off control parts of the high-temperature gas system pipelines here is particularly important. The traditional control method generally uses a disc-type globe valve; Dust particles make it impossible to achieve long-term effective sealing between the valve disc and the valve seat; secondly, it is easy to wear and cannot withstand high temperatures; and the sealing performance is poor, requiring frequent maintenance and replacement, resulting in increased purchase and use costs, and the effect has not been good. good. [0003] In addition, in the existing globe valve, the contact surface between the valve seat and the d...

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Problems solved by technology

[0002] In the gas pipeline valves for dust in high-temperature environments, due to the inclusion of a large amount of dust, the sealing of the on-off control parts of the high-temperature gas system pipelines here is particularly important. The traditional control method generally uses a disc-type globe valve; Dust particles make it impossible to achieve long-term effective sealing between the valve disc and the valve seat; secondly, it is easy to wear and cannot withstand high temperatures; and the sealing performance is poor, requiring frequent maintenance and replacement, resulting in increased purchase and use costs, and the effect has not been good. good

[0003] In addition, in the existing globe valve, the contact surface between the valve seat and the disc is usually set as a large plane, and the two hard planes are in contact with each other to seal. Or impurities accumulate on the plane, resulting in a loose fit between the contact surface and the disc, which reduces the sealing performance, especially when the temperature reaches 400-600°C or even higher, the current valve body cannot meet the requirements of complete cut-off. requirements, then for the opening and closing of flammable gases or even toxic gases, long-term leakage may cause workers to face great safety hazards, even life-threatening, which is not conducive to safe production and operation of workers' lives, health and safety.

Nevertheless, the high-performance globe valve connecting flange is usually cast integrally with the shell and made by machining, which has a thick structure and high production cost, and cannot fundamentally solve the corresponding problems; therefore, a self-grinding high-temperature dust is required. Environmental gas line sealing seat valve

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